Pulse wave
a waveform used by synthesizers
A pulse wave, pulse train, or rectangular wave is a sequence of discrete pulses occurring in a signal over time. Typically, these pulses are of similar shape and are evenly spaced in time, forming a periodic or near-periodic sequence. Pulse waves outputs are widely used in tachometers, speedometers and encoders. Such pulse sequences appear in multiple fields of technology and engineering, where a pulse wave often denotes a series of electrical pulses generated by a sensor (for example, teeth of a rotating gear inducing pulses in a pickup sensor), or pulse wave is connected to signal processing and computer graphics, where a pulse wave is treated as a mathematical signal or function that repeats with a fixed period.
Definition and mechanism
Several key parameters define the characteristics of a pulse wave. The pulse duration, often denoted by the Greek letter tau (τ) or as t1, represents the length of time for which each pulse is active, typically at its high level. Following each pulse is a period of inactivity known as the pulse separation, indicated as t2. The sum of the pulse duration and the pulse separation constitutes the period (T) of the wave, representing one complete cycle (T = t1 + t2). A crucial parameter derived from these is the duty cycle (D), which is the ratio of the pulse duration to the total period (D = τ/T), often expressed as a percentage. Notably, a pulse wave with a 50% duty cycle, where the pulse duration is equal to the pulse separation, is known as a square wave.
Begin with the source’s own compact description: “Pulse wave” is a waveform used by synthesizers. The dossier treats that line as a proposition to test through Pulse, wave and waveform, not as a finished interpretation.
Why this record matters
The phrase “a waveform used by synthesizers” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Mar 20, 2026. The linked authority identifier is Q7259685. None of the 0 selected statements returned an explicit reference.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Pulse wave”, its source revision and the description used here.
- Expand the search: follow Pulse wave primary sources, Pulse wave archive and Pulse research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Pulse wave”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Pulse wave” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.